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Expired European patentEurope

Electric noise absorber

EP 0452992 B1 · Applicant: KITAGAWA INDUSTRIES CO., LTD.

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed March 12, 1987 and granted June 23, 1993. A European patent lasts at most 20 years from filing, so its term ended March 12, 2007.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by September 12, 2012.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMarch 12, 1987
PublishedOctober 23, 1991
GrantedJune 23, 1993
Term endedMarch 12, 2007
Application numberEP 91110713
Classification (CPC)H01F27/33 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 12, 1987PublishedOct 23, 1991Patent grantedJune 23, 1993Term endedMarch 12, 2007

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.